RM0345 datasheet(23/38 Pages) STMICROELECTRONICS

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RM0345

Calibration software compatibility and configuration

Doc ID 024080 Rev 3

23/38

Note:

The P/A/G column indicates the position a signal occupies in the muxing order for a pin:

Primary, Alternate 1, Alternate 2, Alternate 3, or GPIO. Signals are selected by setting the

PA field value in the appropriate PCR register in the SIU module. The PA field values are as

follows: P - 0b0001, A1 - 0b0010, A2 -0b0100, A3 - 0b1000, or G - 0b0000. Depending on

the register, the PA field size can vary in length. For PA fields having fewer than four bits,

remove the appropriate number of leading zeroes from these values.

The Pad Configuration Register (PCR) PA field is used by software to select pin function.

Values in the PCR No. column refer to registers in the System Integration Unit (SIU). The

actual register name is “SIU_PCR” suffixed by the PCR number.

9.1.2

Cal Bus ECCR Settings

The SIU ECCR registers used to control the timing relationship between the system clock

and the external clock CLKOUT.

The external bus clock (CLKOUT) divider can be programmed to divide the system clock by

one, two or four based on the settings of the EBDF bit field.

C_CS[3]

CAL_CS[3]

Calibration

chip select

339

CAL_ADDR[11]

Calibration

address bus

C_OE

CAL_OE

Calibration

Output enable

342

C_RD_WR

CAL_RD_WR

Calibration

Read/write

342

C_WE[0:1]

CAL_WE[0:1]

Calibration

write/byte

enable

342

C_TS

CAL_TS

Calibration

transfer start

343

CAL_ALE

Address Latch

enable

Clock Synthesizer (1)

C_CLKOUT

CLKOUT

System clock

output

P01

229

Clock output

signal from MCU

Table 11.

Calibration bus signals configuration (continued)

signal name

SPC563M64xx

mcu signal name

Function

(1)

PCR

field

(2)

PCR

(3)

Notes

Table 12.

EBDF field definition

EBDF field

External Bus Division Factor

SIU_ECCR

reserved

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